Synthesis, crystal structure and infrared spectra of Cu(II) and Co(II) complexes with 4,4′‐dichloro‐2,2′‐[ethylene dioxybis(nitrilomethylidyne)]diphenol

Dong, Wen‐Kui; Shi, Jun; Xu, Li; Zhong, Jin-Kui; Duan, Jicheng; Zhang, Yanping

doi:10.1002/aoc.1355

Cited by 26 publications

(10 citation statements)

References 19 publications

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“…A weak band at 1,724 and 1,722 cm -1 for the free bisoximes H 2 L 1 and H 2 L 2 is absent in the spectra of the corresponding complexes, which is attributed to the carbonyl oxygen coordinating to the copper center. Weak bands at 509 and 441 cm -1 for complex 1 and at 538 and 439 cm -1 for complex 2 are assigned to m(Cu-N) and m(Cu-O) [17], respectively, consistent with the literature values [18][19][20].…”

Section: Resultssupporting

confidence: 88%

Studies on mono- and dinuclear bisoxime copper complexes with different coordination geometries

Dong

Tong

Sun

et al. 2010

Transition Met Chem

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Two new mono-and dinuclear Cu(II) complexes, namely [CuL 1 ]Á0.5H 2 O (1) and [(Cu 2 (L 2 ) 2 )(DMF)]Á 0.5DMF (2) (H 2 L 1 = 1,2-bis{[(Z)-(3-methyl-5-oxo-1-phenyl-1H-pyrazolidin-4(4H)-yl)(phenyl)]methylene-aminooxy} ethane; H 2 L 2 = 1,3-bis{[(Z)-(3-methyl-5-oxo-1-phenyl-1H-pyrazolidin-4(4H)-yl)(phenyl)] methyleneaminooxy}pro-pane), have been synthesized and characterized by X-ray crystallography. The unit cell of complex 1 contains two crystallographically independent but chemically identical [CuL 1 ] molecules and one crystalline water molecule, showing a slightly distorted square-planar coordination geometry and forming a wave-like pattern running along the a-axis via hydrogen bonding and pÁÁÁp stacking interactions. Complex 2 has a dinuclear structure, comprising two Cu(II) atoms, two completely deprotonated phenolate bisoxime (L 2 ) 2-moieties (in the form of enol), and both coordinated and hemi-crystalline DMF molecules. Complex 2 has square-planar and square-pyramidal geometries around the two copper centers, whose basic coordination planes are almost perpendicular and form an infinite threedimensional supramolecular network structure involving intermolecular C-HÁÁÁN, C-HÁÁÁO, and C-HÁÁÁp(Ph) hydrogen bonding and pÁÁÁp stacking interactions of neighboring pyrazole rings.

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Section: Resultssupporting

confidence: 88%

Studies on mono- and dinuclear bisoxime copper complexes with different coordination geometries

Dong

Tong

Sun

et al. 2010

Transition Met Chem

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“…If an O-alkyloxime moiety (-CH=N-O-(CH 2)n-O-N=CH-)i su sed instead of the imine moiety, the larger electronegativity of oxygen atoms is expected to strongly affect the electronic properties of N 2 O 2 coordination sphere, which can lead to different and novel properties and structures of the resulted complexes [6,7]. Recently, we studied trinuclear complexes of cobalt [8,9]. The crystal structure contains al inear trinuclear array of three Ni(II) ions coupled by both doubly m-phenoxo oxygen atoms of (C 19 H 20 N 2 O 6 ) 2-units and simultaneously two acetate anions in the syn-syn bridging mode.…”

Section: Discussionmentioning

confidence: 99%

Crystal structure of bis[(3,3'-dimethoxy-2,2'-1,3-propylene)dioxybis( nitrilomethylidyne)diphenolato]-bis(acetato-O1,O2)- bis(ethanol-O)trinickel(II) — ethanol — acetone (1:2:1.06), Ni3(C19H20N2O6)2(C2H5OH)2(C2H3O2)2 · 2C2H5OH · 1.06C3H6O

Gao¹,

Dong²,

Li³

et al. 2011

Zeitschrift Für Kristallographie - New Crystal Structures

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Source of materialAsolution of nickel(II) acetate tetrahydrate (8.1 mg, 0.03 mmol) in ethanol (4 ml) was added dropwise to as olution of 3,3'-dimethoxy-2,2'-[(1,3-propylene)dioxybis(nitrilomethylidyne)]-diphenol (12.1 mg, 0.03 mmol) in acetone (30 ml). The color of the mixed solution turned to pale-green immediately, then the mixture was stirred for 1hatroom temperature. Finally, the solution was filtered, and the filtrate was allowed to stand at room temperature for about one week. When the solvent was partially evaporated, several green block-shaped single crystals suitable for X-ray crystallographic analysis were obtained. Experimental detailsAll Hatoms were positioned geometrically with d(C-H) =0.93 -0.98 Å,and refined as riding with U iso(H) =1.2 or 1.5 Ueq(C). The aceton molecule and the ethyl group of an ethanol molecule are disordered with occupancies of 0.532(6) and 0.56(2) :0.44(2), respectively. DiscussionTransition metal complexes with N,N'-disalicylideneethylenediamine (salen) ligand or its derivatives are extensively investigated, because these complexes have played aseminal role in the development of modern coordination chemistry. They can also be used in the design and construction of new magnetic materials and model of the metal center of enzymes. Although some advance has been made in the studies of salen-Ni(II) complexes [1-3], it still seems there could be new and specific applications for such aunique group of compounds. To change the structures or improve the functions of the resulted complexes, chemical modifications of the elemental salen-type ligand, e.g., introduction of some functional groups or appropriate substitution of some parts, are effective and inevitable. In particular, replacement of some atoms of the ligand with other elements often changes its properties drastically [4,5]. If an O-alkyloxime moiety (-CH=N-O-(CH 2)n-O-N=CH-)i su sed instead of the imine moiety, the larger electronegativity of oxygen atoms is expected to strongly affect the electronic properties of N 2 O 2 coordination sphere, which can lead to different and novel properties and structures of the resulted complexes [6,7]. Recently, we studied trinuclear complexes of cobalt [8,9]. The crystal structure contains al inear trinuclear array of three Ni(II) ions coupled by both doubly m-phenoxo oxygen atoms of (C 19 H 20 N 2 O 6 ) 2-units and simultaneously two acetate anions in the syn-syn bridging mode. The hexa-coordinated Ni(II) ions of the cluster have aslightly distorted octahedral coordination. The terminal nickel(II) ions (Ni2 and Ni2')are located in the N 2O2 coordination sphere of (C 19H20N2O6) 2-unit. One oxygen atom O8 from the m-acetato bridge and one oxygen atom O9 from the ethanol molecule are also coordinating Ni2. Consequently, the dihedral angle between the coordination plane of O5-Ni2-N1 and that of O3-Ni2-N2 is about 6.88(2)°,indicating slight distortion from the square planar toward octahedral geometry. In addition, the coordination sphere of the central nickel(II) ion (Ni1) is completed by q...

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“…The ligand 4,4′-dichloro-2,2′-[(propane-1,3-diyldioxy)bis(nitrilomethylidyne)]diphenol (H2L 1 ) was synthesized in accordance with a similar method reported earlier [44,48,50] …”

Section: Synthesis Of H2lmentioning

confidence: 99%

Trinuclear Co(II) and Mononuclear Ni(II) Salamo-Type Bisoxime Coordination Compounds

Kang

Liu

et al. 2018

Crystals

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Abstract:One trinuclear Co(II) coordination compound [{CoL 1 (OAc)(CH 3 COCH 3 )} 2 Co] (1) and one unprecedented mononuclear Ni(II) coordination compound [Ni(L 2 ) 2 ] (2), constructed from a Salamo-type ligand H 2 L 1 were synthesized and characterized by elemental analyses, IR, UV-vis spectra, and single crystal X-ray diffraction analyses. The results show that the Co(II) atoms have no significant distortion in CoO 6 or CoO 4 N 2 octahedrons in coordination compound 1. Interestingly, in coordination compound 2, the desired tri-or mono-nuclear Salamo-type Ni(II) coordination compound was not obtained, but an unprecedented Ni(II) coordination compound [Ni(L 2 ) 2 ] was synthesized, the Ni1 atom having no significant distortion in the NiO 2 N 2 planar quadrilateral geometry. Furthermore, the antimicrobial activities of coordination compound 1 and previously reported coordination compound [{CoL 1 (OAc)(MeOH)} 2 Co]·2MeOH (3) are discussed.

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Synthesis, crystal structure and infrared spectra of Cu(II) and Co(II) complexes with 4,4′‐dichloro‐2,2′‐[ethylene dioxybis(nitrilomethylidyne)]diphenol

Cited by 26 publications

References 19 publications

Studies on mono- and dinuclear bisoxime copper complexes with different coordination geometries

Studies on mono- and dinuclear bisoxime copper complexes with different coordination geometries

Crystal structure of bis[(3,3'-dimethoxy-2,2'-1,3-propylene)dioxybis( nitrilomethylidyne)diphenolato]-bis(acetato-O1,O2)- bis(ethanol-O)trinickel(II) — ethanol — acetone (1:2:1.06), Ni3(C19H20N2O6)2(C2H5OH)2(C2H3O2)2 · 2C2H5OH · 1.06C3H6O

Trinuclear Co(II) and Mononuclear Ni(II) Salamo-Type Bisoxime Coordination Compounds

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